KOZHIKODE: Cinematographer and director PS Nivas (73) passed away here on Monday. He was under treatment at Kozhikode Medical College for more than a month. He has done cinematography for several films in Malayalam, Tamil and Telugu languages. In 1977, he won the National Award for the best cinematography for his work in the film Mohiniyattam. Navas was the cameraman for Bharathi Raja's films in Tamil.